For a pole saw, I strongly prefer the manual version to the powered ones.
Costco currently selling a 16 foot Fiskars for $50 bucks. When that blade is sharp, you could deforest your entire yard in a couple hours. Perfect tool for that job.
For a small chainsaw, I think they all are pretty good. If you are new to the battery stuff, the main consideration is to pick a brand that has other tools that you like. I started with an Ego lawn mower, which is excellent. So I now have added an Ego leaf blower, weed whacker, hedge trimmer and small chain saw.